ProBook 6545b Fan (maybe) an issue

I have a ProBook 6545b notebook computer with Windows 7 Professional on it. I've had it since the spring of 2010.

I don't know if this is a problem but, up until maybe 3 or 4 months ago, the fan rarely ran high. Now, and it seems like it may be since an update I received through HP Support Assistant, it seems to run higher more often than it used to.

I don't know if it's a problem because the air coming out of the fan outlet is warm, so maybe it's doing the right thing, but I'm a little concerned.